Pressure-equalizer for rotary blowers.



0. BANNER. PRESSURE EQUALIZER FOR ROTARY BLOWERS.

APPLICATION FILED DEC. 15, 1911.

Patented Apr. 14, 1914.

mLuIABIA PLANOGRAIZN co.. WASHINGTON. D. e.

OTTO BANNER, F STERKRADE, GERMANY, ASSIGNOR T0 INGERSOLL-RAND COM- PANY, OF NEW YORK, N. Y., A CORPGRATION OF NEW JERSEY.

PRESSURE-EQUALIZER FOR ROTARY BLOWERS.

Specification of Letters Patent.

Application filed December 15, 1911.

Patented Apr. 141, 1%14. Serial No. 665,994.

To all whom it may concern Be it known that I, OTTO BANNER, a subject of the German Emperor, and resident of Sterkrade, Germany, have invented a new and useful Improvement in Pressure- Equalizers for Rotary Blowers, of which the following is a specification.

The object of this invention is to provide means for maintaining an equal fluid pressure within a series of journal boxes for the rotary blower or compressor shaft whereby an equal supply of oil may be fed to each journal box, and it is especially useful for machines having cylinders containing different pressures.

The accompanying drawings represent a compound rotary blower or compressor of the two-stage type, partly in side elevation and partly in longitudinal central section.

T he low pressure cylinder is denoted by 1, its inlet by 2 and its outlet by 3. The high pressure cylinder is denoted by 4, its inlet by 5 and its outlet by 6. A pipe 7 forms a passage from the outlet 3 of the low pressure cylinder 1 to the inlet 5 of the high pressure cylinder 4. The rotary shaft 8 of the blower or compressor extends through the cylinders and through intermediate and end journal boxes 9 and 10. A pipe 11 forms a passage leading from the interior of the journal box 9 to the interior of the journal box for maintaining an equal fluid pressure in both boxes. Packings l2, and 18, are provided for the shaft 8 at the delivery ends of the low and high pressure cylinders and a packing 14 is provided for the shaft at the inlet end of the high pressure cylinder.

The pipes for supplying oil to the bearlugs 15, 16, are denoted by 17, 1S, and the oil drain pipes for the boxes 9 and 10 are denoted by 19 and 20. The open ends of the pipe 11 project upwardly within the journal boxes 9 and 10 to points near their tops, above the level of the oil in said journal boxes.

In practice, where means is not employed for equalizing the fluid pressure in the j ournal boxes, the fluid which leaks into the intermediate box from the high pressure cylinder will raise the pressure in this box and the means for feeding oil to the journal boxes will be caused to pump against a greater pressure in the intermediate box than in the outer box and the intermediate box will therefore receive less oil than the outer box and will run hot in consequence. By the employment of my invention whereby the specified journal boxes are subjected to a uniform pressure, an even feeding of oil is insured to the boxes.

What I claim is In a rotary blower or compressor, a plurality of cylinders, intermediate and end journal boxes and. means for maintaining an equal fluid pressure in said intermediate and end journal boxes.

In testimony, that I claim the foregoing as my invention, I have signed my name in presence of two witnesses, this twenty-second day of May 1911.

OTTO BANNER.

lVitnesses F. GEORGE BARRY, C. S. LUNDGREN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

